Alincourt is located some 15 km south ofRethel and 25 km north-east ofRheims. It can be accessed on the D925 road fromNeuflize in the west passing through the heart of the commune and the village and continuing east toJuniville. The D985 road fromPerthes in the north also passes through the north-west of the commune and continues to join the D925 west of Juniville. The commune consists entirely of farmland other than a strip of forest along the banks of the river.[3]
TheRetourne river flows through the commune from east to west passing just south of the village and continuing west until it joins theAisne atNeufchatel-sur-Aisne.[3]
TheChurch of Saint-Hilaire has the epitaph:"to ... Sir Regnaut Feret living knight and Lord of Alincourt Captain of the Regiment of Maine deceased at Bar-le-Duc buried in the Church of Sainte Macre on 16 July 1697 ... Charged in perpetuity to say a High Mass and a vigil at the hour of his decease ... to buy ornaments for the Alincourt church, the place of burial of his father and ancestors" inscribed on black marble on the right side of thechoir. On the left side is ..."Sir Jean Claude de Cugnon, Knight and Lord of Alincourt, Branscourt Sorbon, and Arnicourt was buried in this church on 10 September 1775" ... on black marble.